CECO ENVIRONMENTAL CORP Note Agreements

SUBORDINATED CONVERTIBLE PROMISSORY NOTE (Filed With SEC on December 1, 2009)

FIRST AMENDMENT TO PROMISSORY NOTE (Filed With SEC on November 9, 2009)

CECO ENVIRONMENTAL CORP. PROMISSORY NOTE (Filed With SEC on August 10, 2009)

Second Amendment to Subordinated Convertible Promissory Note (Filed With SEC on August 10, 2009)

CECO ENVIRONMENTAL CORP. SUBORDINATED CONVERTIBLE PROMISSORY NOTE (Filed With SEC on November 10, 2008)

SUBORDINATED CONVERTIBLE PROMISSORY NOTE (Filed With SEC on November 10, 2008)

A FIFTH THIRD BANCORP BANK TERM PROMISSORY NOTE (TERMLOAN C) (Filed With SEC on March 3, 2008)

SIXTH AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on March 30, 2007)

FOURTH AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on March 30, 2007)

CECO Environmental Corp. FOURTH AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on March 30, 2006)

CECO Environmental Corp. THIRD AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on March 30, 2006)

CECO Environmental Corp. SECOND AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on March 30, 2006)

CECO Environmental Corp. THIRD AMENDED AND RESTATED REPLACEMENT PROMISSORY NOTE (Filed With SEC on April 15, 2005)

PROMISSORY NOTE (Filed With SEC on April 15, 2005)